Debian Security Advisory

DSA-3888-1 exim4 -- security update

The Qualys Research Labs discovered a memory leak in the Exim mail
transport agent. This is not a security vulnerability in Exim by itself,
but can be used to exploit a vulnerability in stack handling. For the
full details, please refer to their advisory published at:
https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt

For the oldstable distribution (jessie), this problem has been fixed
in version 4.84.2-2+deb8u4.

For the stable distribution (stretch), this problem has been fixed in
version 4.89-2+deb9u1.